| ALL Grown UP Ltd | Hospitality | 2026 |
| ALL in One Centre Ltd | Wholesale & retail | 2018 |
| ALL in One Garments Ltd | Manufacturing | 2017 |
| ALL Leisure North West Limited | Hospitality | 2017 |
| ALL Link UK Ltd | Wholesale & retail | 2022 |
| ALL Mouse Media Limited | Information & communication | 2010 |
| ALL Projects Security Ltd | Administrative & support | 2024 |
| ALL Saints EYE Care Ltd | Health & social care | 2015 |
| ALL Saints Property Ltd | Real estate | 2017 |
| ALL Seasons Boat Covers Ltd | Manufacturing | 2024 |
| ALL Seasons Boat Cushions Ltd | Manufacturing | 2024 |
| ALL Seasons Waterproof Covers Ltd | Manufacturing | 2014 |
| ALL Smiles Pre-School Ltd | Education | 2020 |
| ALL Toys Store Ltd | Wholesale & retail | 2025 |
| All-In Cart Ltd | Transport & logistics | 2025 |
| Allaura Stroud Ltd | Health & social care | 2022 |
| ALLBY40 Ltd | Wholesale & retail | 2025 |
| Allclean Sussex Ltd | Administrative & support | 2020 |
| Allco Signs Ltd | Professional & scientific | 2008 |
| Allemond Ltd | Financial services | 2022 |
| Allen and Barber Property Surveys Limited | Real estate | 2021 |
| Allen Street Management Company Limited | Real estate | 2018 |
| Allen's Fried Chicken Ltd | Hospitality | 2025 |
| Allerlei Ltd | Manufacturing | 2022 |
| Alli Intelligence Ltd | Information & communication | 2025 |
| Alli Optics Ltd | Health & social care | 2024 |
| Alliance Automation Limited | Information & communication | 2022 |
| Alliance Estate NW Ltd | Construction | 2023 |
| Alliance Foster Care Limited | Health & social care | 2001 |
| Alliance Learning | Education | 1982 |
| Alliance Learning Training Limited | Education | 2016 |
| Alliance Morley Limited | Real estate | 2022 |
| Alliance MRK Properties Ltd | Real estate | 2021 |
| Alliance of Hope & Care C.I.C. | Other services | 2024 |
| Alliance Refurbishment Limited | Construction | 2019 |
| Alliance Site Services Limited | Manufacturing | 2025 |
| Alliances Care UK Ltd | Health & social care | 2025 |
| Allied Car Limited | Wholesale & retail | 2026 |
| Allied Freight & Logistic Ltd | Transport & logistics | 2026 |
| Allied Professionals Ltd | Health & social care | 2022 |
| Allied Techs Ltd | Wholesale & retail | 2019 |
| Allied Vehicle Assist Ltd | Transport & logistics | 2014 |
| Alliedtropic Limited | Administrative & support | 2003 |
| Allison and Co Property Limited | Real estate | 2011 |
| Allison Corbett Wellbeing Limited | Health & social care | 2017 |
| Allium Virtual Assistant Limited | Administrative & support | 2022 |
| Alloa Propco SL Limited | Construction | 2021 |
| Allora Mart Ltd | Wholesale & retail | 2025 |
| Allsop Bros Holdings Limited | Wholesale & retail | 2020 |
| Allsops of Bolton Ltd | Manufacturing | 2010 |
| Allsprings Development Limited | Real estate | 1996 |
| Alltrades Bolton Limited | Construction | 2011 |
| Alltronicx Limited | Wholesale & retail | 2024 |
| Allure Lashes -Training & Aesthetics Ltd | Extraterritorial | 2021 |
| Allure Property Services Limited | Real estate | 2023 |
| Alluresuk Ltd | Wholesale & retail | 2024 |
| Alluzen LLP | | 2024 |
| Ally Homes Ltd | Real estate | 2024 |
| Ally Inc Ltd | Real estate | 2024 |
| Allys Limited | Health & social care | 2019 |
| Allzest Ltd | Real estate | 2000 |
| ALM Business Limited | Other services | 2015 |
| ALM Coaching & Consulting Limited | Professional & scientific | 2024 |
| ALM Pet Services Ltd | Other services | 2025 |
| ALM786 Ltd | Other services | 2016 |
| Alma Invest Ltd | Information & communication | 2019 |
| Alma Verde Limited | Financial services | 2025 |
| Almabrook Bolton Ltd | Wholesale & retail | 2024 |
| Almani Ltd | Wholesale & retail | 2025 |
| Almeida Martins Ltd | Professional & scientific | 2026 |
| Almond Brook Properties Limited | Real estate | 2021 |
| Almond Estates Limited | Real estate | 2015 |
| Almtex Limited | Extraterritorial | 2014 |
| Almutraf for Investment Ltd | Construction | 2025 |
| Alnb Ltd | Administrative & support | 2019 |
| ALO Co Holdings Ltd | Financial services | 2024 |
| Along Dusty Roads Ltd | Information & communication | 2016 |
| Alopex Cranleigh Ltd | Real estate | 2021 |
| Alouchi Couriers Ltd | Transport & logistics | 2025 |
| Alova Ltd | Wholesale & retail | 2025 |
| ALP Property Solutions Ltd | Real estate | 2016 |
| Alpaca Kroll Holdings Limited | Financial services | 2024 |
| Alpha Bolton Ltd | Real estate | 2023 |
| Alpha Construction (North West) Ltd | Construction | 2024 |
| Alpha Cornerstone Ltd | Real estate | 2018 |
| Alpha Courier Services Ltd | Transport & logistics | 2025 |
| Alpha Digital Group Limited | Professional & scientific | 2022 |
| Alpha Fire Solutions Ltd | Public administration | 2025 |
| Alpha G Collections Ltd | Wholesale & retail | 2024 |
| Alpha Lighting Solutions Limited | Construction | 2006 |
| Alpha Limited | Professional & scientific | 2002 |
| Alpha Luxury Minibuses Limited | Transport & logistics | 2016 |
| Alpha Pharmachem Ltd. | Wholesale & retail | 2018 |
| Alpha Plus Fostering Limited | Health & social care | 2006 |
| Alpha Recycling Services Limited | Water & waste | 2008 |
| Alpha Roofing and Building N/W Ltd | Construction | 2025 |
| Alpha Signature Limited | Manufacturing | 2020 |
| Alpha Steel Ltd | Manufacturing | 2020 |
| Alpha Surgery Ltd | Health & social care | 2018 |
| Alpha Tech PVT Ltd | Information & communication | 2025 |